50 lines
1.8 KiB
Plaintext
50 lines
1.8 KiB
Plaintext
// Copyright (c) OpenMMLab. All rights reserved.
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#include <stdint.h>
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namespace mmdeploy {
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namespace cuda {
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template <typename T, int channels>
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__global__ void crop(const T *src, int src_w, T *dst, int dst_h, int dst_w, int offset_h,
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int offset_w) {
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int x = blockIdx.x * blockDim.x + threadIdx.x;
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int y = blockIdx.y * blockDim.y + threadIdx.y;
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if (x >= dst_w || y >= dst_h) return;
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int src_x = x + offset_w;
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int src_y = y + offset_h;
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int dst_loc = (y * dst_w + x) * channels;
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int src_loc = (src_y * src_w + src_x) * channels;
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for (int i = 0; i < channels; ++i) {
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dst[dst_loc + i] = src[src_loc + i];
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}
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}
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template <typename T, int channels>
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void Crop(const T *src, int src_w, T *dst, int dst_h, int dst_w, int offset_h, int offset_w,
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cudaStream_t stream) {
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const dim3 thread_block(32, 8);
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const dim3 block_num((dst_w + thread_block.x - 1) / thread_block.x,
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(dst_h + thread_block.y - 1) / thread_block.y);
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crop<T, channels>
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<<<block_num, thread_block, 0, stream>>>(src, src_w, dst, dst_h, dst_w, offset_h, offset_w);
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}
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template void Crop<uint8_t, 3>(const uint8_t *src, int src_w, uint8_t *dst, int dst_h, int dst_w,
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int offset_h, int offset_w, cudaStream_t stream);
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template void Crop<uint8_t, 1>(const uint8_t *src, int src_w, uint8_t *dst, int dst_h, int dst_w,
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int offset_h, int offset_w, cudaStream_t stream);
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template void Crop<float, 3>(const float *src, int src_w, float *dst, int dst_h, int dst_w,
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int offset_h, int offset_w, cudaStream_t stream);
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template void Crop<float, 1>(const float *src, int src_w, float *dst, int dst_h, int dst_w,
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int offset_h, int offset_w, cudaStream_t stream);
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} // namespace cuda
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} // namespace mmdeploy
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